Intelligent low-voltage comprehensive safety protection apparatus

Abstract

The invention discloses an intelligent low-voltage comprehensive safety protection apparatus. The intelligent low-voltage comprehensive safety protection apparatus comprises a CPU part, an I/O part, apower supply part and a display part; an MCU part comprises an MCU processor, a communication processing module and an indicator lamp; the I/O part comprises a voltage current collection module, an output module and a switching value collection module; the display part comprises a key and a man-machine interface; and the power supply part comprises a control output module and a power supply conversion module. The apparatus, based on the micro-processing technology, adopts the dual-CPU structure, embedded design, a 32-bit digital signal processing technology and a redundant filed bus technology, so that high measurement precision, accurate and reliable fault analysis, and guaranteed system reliability and automatic level can be achieved; the apparatus provides 16 kinds of protection functions of quick breaking, overcurrent, undervoltage, overvoltage, locked rotor and the like, seven kinds of motor starting control modes, and seven kinds of online measurement and display functions; thedisplay adopts 262K true color liquid crystal; and the interface adopts computer graphic display, so that vivid man machine interaction is realized.

Description

technical field [0001] The invention relates to a protector, in particular to an intelligent low-voltage comprehensive safety protection device. Background technique [0002] Like all products, motor protectors have experienced a scientific and perfect development process from low-level to high-level, from simple to complex. Several stages of development are roughly as follows [0003] 1. Thermal relays, fuses and electromagnetic current relays [0004] In the early days of the founding of the People's Republic of China, we introduced the JR series thermal relays from the Soviet Union and used them in China's motor protection industry for half a century. Until 1996, the eight ministries and commissions of the country jointly issued a document to force them to be eliminated. Thermal relays used to be the first choice for motor overload protection in the era when the electronics industry was underdeveloped, but thermal relays had fatal flaws, including rough setting, large e...

AI Technical Summary

Problems solved by technology

[0008] This type of motor protector mainly uses a single-chip microcomputer as the controller, which has a qualitative leap in sampling and setting accuracy, but these early products have a lot of room for improvement in function, such as incomplete protection functions and unfriendly man-machine interface. , the communication function is not perfect, etc.

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